Added ST Number to bill.

Fixed error were unprinted bill was not removed from table when voided.

Tanshu.Accounts.Contracts/Data Contracts Display/BillItemKey.cs

@@ -5,7 +5,9 @@ namespace Tanshu.Accounts.Contracts
     public enum BillItemType
     {
         Product,
-        Kot
+        Kot,
+        Information,
+        Total
     }
     public class BillItemKey
     {

Tanshu.Accounts.Contracts/Data Contracts/FoodTableBO.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Runtime.Serialization;
-using FluentNHibernate.Mapping;
-
-namespace Tanshu.Accounts.Entities
+namespace Tanshu.Accounts.Entities
 {
     public class FoodTable
     {